A method to agglomerate ice crystals to produce a large ice crystal in
glucose solution was proposed. Ice crystals were agglomerated and the
agglomerates fused to a large ice crystal in a common batch crystalli
zer in which the heat for ice crystallization was removed through the
wall of the crystallizer by the coolant circulating Keys to making lar
ge agglomerated ice crystals are to keep the initial supercooling, the
temperature difference between the lowest temperature initially attai
ned and the freezing point of the solution less than 0.2 K and to intr
oduce seed ice crystals more than 6% of the solution weight to trigger
the ice crystallization. The large agglomerated ice crystals were pro
duced regardless of the crystal size distribution of the seed ice crys
tals. However ice crystals failed to agglomerate in glucose solutions
of more than 20%, though gigantic ice crystals that have seldom been r
eported before were produced in 10% glucose solution.